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author | Mike Melanson <mike@multimedia.cx> | 2003-06-19 01:44:44 +0000 |
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committer | Mike Melanson <mike@multimedia.cx> | 2003-06-19 01:44:44 +0000 |
commit | da3b9756306ad8edde9e5b1fc6d6e169cc202681 (patch) | |
tree | 6af6f6f77a55cedad106cf8bc259d81ebda8bd42 /libavcodec/svq3.c | |
parent | ccdaf63dc3cd7d193d61b390fe3609a4e5d66eed (diff) | |
download | ffmpeg-streaming-da3b9756306ad8edde9e5b1fc6d6e169cc202681.zip ffmpeg-streaming-da3b9756306ad8edde9e5b1fc6d6e169cc202681.tar.gz |
added support for B-frames and multiple slices
Originally committed as revision 1974 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/svq3.c')
-rw-r--r-- | libavcodec/svq3.c | 510 |
1 files changed, 380 insertions, 130 deletions
diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c index 72e5baf..e565bd0 100644 --- a/libavcodec/svq3.c +++ b/libavcodec/svq3.c @@ -262,8 +262,12 @@ static inline int svq3_decode_block (GetBitContext *gb, DCTELEM *block, return 0; } -static inline void svq3_mc_dir_part (MpegEncContext *s, int x, int y, - int width, int height, int mx, int my, int dxy, int thirdpel) { +static inline void svq3_mc_dir_part (MpegEncContext *s, + int x, int y, int width, int height, + int mx, int my, int dxy, + int thirdpel, int dir, int avg) { + + const Picture *pic = (dir == 0) ? &s->last_picture : &s->next_picture; uint8_t *src, *dest; int i, emu = 0; int blocksize= 2 - (width>>3); //16->0, 8->1, 4->2 @@ -284,17 +288,17 @@ static inline void svq3_mc_dir_part (MpegEncContext *s, int x, int y, /* form component predictions */ dest = s->current_picture.data[0] + x + y*s->linesize; - src = s->last_picture.data[0] + mx + my*s->linesize; + src = pic->data[0] + mx + my*s->linesize; if (emu) { - ff_emulated_edge_mc(s->edge_emu_buffer, src, s->linesize, (width + 1), (height + 1), + ff_emulated_edge_mc (s, src, s->linesize, (width + 1), (height + 1), mx, my, s->h_edge_pos, s->v_edge_pos); src = s->edge_emu_buffer; } if(thirdpel) - s->dsp.put_tpel_pixels_tab[dxy](dest, src, s->linesize, width, height); + (avg ? s->dsp.avg_tpel_pixels_tab : s->dsp.put_tpel_pixels_tab)[dxy](dest, src, s->linesize, width, height); else - s->dsp.put_pixels_tab[blocksize][dxy](dest, src, s->linesize, height); + (avg ? s->dsp.avg_pixels_tab : s->dsp.put_pixels_tab)[blocksize][dxy](dest, src, s->linesize, height); if (!(s->flags & CODEC_FLAG_GRAY)) { mx = (mx + (mx < (int) x)) >> 1; @@ -305,17 +309,17 @@ static inline void svq3_mc_dir_part (MpegEncContext *s, int x, int y, for (i=1; i < 3; i++) { dest = s->current_picture.data[i] + (x >> 1) + (y >> 1)*s->uvlinesize; - src = s->last_picture.data[i] + mx + my*s->uvlinesize; + src = pic->data[i] + mx + my*s->uvlinesize; if (emu) { - ff_emulated_edge_mc(s->edge_emu_buffer, src, s->uvlinesize, (width + 1), (height + 1), + ff_emulated_edge_mc (s, src, s->uvlinesize, (width + 1), (height + 1), mx, my, (s->h_edge_pos >> 1), (s->v_edge_pos >> 1)); src = s->edge_emu_buffer; } if(thirdpel) - s->dsp.put_tpel_pixels_tab[dxy](dest, src, s->uvlinesize, width, height); + (avg ? s->dsp.avg_tpel_pixels_tab : s->dsp.put_tpel_pixels_tab)[dxy](dest, src, s->uvlinesize, width, height); else - s->dsp.put_pixels_tab[blocksize][dxy](dest, src, s->uvlinesize, height); + (avg ? s->dsp.avg_pixels_tab : s->dsp.put_pixels_tab)[blocksize][dxy](dest, src, s->uvlinesize, height); } } } @@ -334,11 +338,52 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { h->topright_samples_available = 0xFFFF; if (mb_type == 0) { /* SKIP */ - svq3_mc_dir_part (s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0, 0, 0); + if (s->pict_type == P_TYPE) { + svq3_mc_dir_part (s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0, 0, 0, 0, 0); + + cbp = 0; + mb_type = MB_TYPE_SKIP; + } else { + for (dir=0; dir < 2; dir++) { + for (i=0; i < 4; i++) { + for (j=0; j < 4; j++) { + int dxy; + x = 16*s->mb_x + 4*j; + y = 16*s->mb_y + 4*i; + + mx = 2*s->next_picture.motion_val[0][b_xy + j + i*h->b_stride][0]; + my = 2*s->next_picture.motion_val[0][b_xy + j + i*h->b_stride][1]; + + if (dir == 0) { + mx = (mx * h->frame_num_offset) / h->prev_frame_num_offset; + my = (my * h->frame_num_offset) / h->prev_frame_num_offset; + } else { + mx = (mx * (h->frame_num_offset - h->prev_frame_num_offset)) / h->prev_frame_num_offset; + my = (my * (h->frame_num_offset - h->prev_frame_num_offset)) / h->prev_frame_num_offset; + } + + mx = ((unsigned)(mx + 3 + 0x6000))/6 - 0x1000; + my = ((unsigned)(my + 3 + 0x6000))/6 - 0x1000; + dxy= (mx&1) + 2*(my&1); + + /* update mv_cache */ + s->current_picture.motion_val[dir][b_xy + j + i*h->b_stride][0] = 3*mx; + s->current_picture.motion_val[dir][b_xy + j + i*h->b_stride][1] = 3*my; + + svq3_mc_dir_part (s, x, y, 4, 4, mx>>1, my>>1, dxy, 0, dir, (dir == 1)); + } + } + } - cbp = 0; - mb_type = MB_TYPE_SKIP; + if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48) + return -1; + + cbp = golomb_to_inter_cbp[vlc]; + mb_type = MB_TYPE_16x16; + } } else if (mb_type < 8) { /* INTER */ + int dir0, dir1; + if (h->thirdpel_flag && h->halfpel_flag == !get_bits (&s->gb, 1)) { mode = THIRDPEL_MODE; } else if (h->halfpel_flag && h->thirdpel_flag == !get_bits (&s->gb, 1)) { @@ -348,7 +393,7 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { } /* fill caches */ - /* note ref_cache[0] should contain here: + /* note ref_cache should contain here: ???????? ???11111 N??11111 @@ -357,44 +402,62 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { N */ - if (s->mb_x > 0) { - for (i=0; i < 4; i++) { - *(uint32_t *) h->mv_cache[0][scan8[0] - 1 + i*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - 1 + i*h->b_stride]; - } - } else { - for (i=0; i < 4; i++) { - *(uint32_t *) h->mv_cache[0][scan8[0] - 1 + i*8] = 0; + for (m=0; m < 2; m++) { + if (s->mb_x > 0 && h->intra4x4_pred_mode[mb_xy - 1][0] != -1) { + for (i=0; i < 4; i++) { + *(uint32_t *) h->mv_cache[m][scan8[0] - 1 + i*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - 1 + i*h->b_stride]; + } + } else { + for (i=0; i < 4; i++) { + *(uint32_t *) h->mv_cache[m][scan8[0] - 1 + i*8] = 0; + } } - } - if (s->mb_y > 0) { - memcpy (h->mv_cache[0][scan8[0] - 1*8], s->current_picture.motion_val[0][b_xy - h->b_stride], 4*2*sizeof(int16_t)); - memset (&h->ref_cache[0][scan8[0] - 1*8], 1, 4); - - if (s->mb_x < (s->mb_width - 1)) { - *(uint32_t *) h->mv_cache[0][scan8[0] + 4 - 1*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - h->b_stride + 4]; - h->ref_cache[0][scan8[0] + 4 - 1*8] = 1; - }else - h->ref_cache[0][scan8[0] + 4 - 1*8] = PART_NOT_AVAILABLE; - if (s->mb_x > 0) { - *(uint32_t *) h->mv_cache[0][scan8[0] - 1 - 1*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - h->b_stride - 1]; - h->ref_cache[0][scan8[0] - 1 - 1*8] = 1; + if (s->mb_y > 0) { + memcpy (h->mv_cache[m][scan8[0] - 1*8], s->current_picture.motion_val[m][b_xy - h->b_stride], 4*2*sizeof(int16_t)); + memset (&h->ref_cache[m][scan8[0] - 1*8], (h->intra4x4_pred_mode[mb_xy - s->mb_stride][4] == -1) ? PART_NOT_AVAILABLE : 1, 4); + + if (s->mb_x < (s->mb_width - 1)) { + *(uint32_t *) h->mv_cache[m][scan8[0] + 4 - 1*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - h->b_stride + 4]; + h->ref_cache[m][scan8[0] + 4 - 1*8] = + (h->intra4x4_pred_mode[mb_xy - s->mb_stride + 1][0] == -1 || + h->intra4x4_pred_mode[mb_xy - s->mb_stride][4] == -1) ? PART_NOT_AVAILABLE : 1; + }else + h->ref_cache[m][scan8[0] + 4 - 1*8] = PART_NOT_AVAILABLE; + if (s->mb_x > 0) { + *(uint32_t *) h->mv_cache[0][scan8[0] - 1 - 1*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - h->b_stride - 1]; + h->ref_cache[m][scan8[0] - 1 - 1*8] = (h->intra4x4_pred_mode[mb_xy - s->mb_stride - 1][3] == -1) ? PART_NOT_AVAILABLE : 1; + }else + h->ref_cache[m][scan8[0] - 1 - 1*8] = PART_NOT_AVAILABLE; }else - h->ref_cache[0][scan8[0] - 1 - 1*8] = PART_NOT_AVAILABLE; - }else - memset (&h->ref_cache[0][scan8[0] - 1*8 - 1], PART_NOT_AVAILABLE, 8); + memset (&h->ref_cache[m][scan8[0] - 1*8 - 1], PART_NOT_AVAILABLE, 8); + + if (s->pict_type != B_TYPE) + break; + } /* decode motion vector(s) and form prediction(s) */ - part_width = ((mb_type & 5) == 5) ? 4 : 8 << (mb_type & 1); - part_height = 16 >> ((unsigned) mb_type / 3); + if (s->pict_type == P_TYPE) { + part_width = ((mb_type & 5) == 5) ? 4 : 8 << (mb_type & 1); + part_height = 16 >> ((unsigned) mb_type / 3); + dir0 = 0; + dir1 = 0; + } else { /* B_TYPE */ + part_width = 16; + part_height = 16; + dir0 = (mb_type == 2) ? 1 : 0; + dir1 = (mb_type == 1) ? 0 : 1; + } + for (dir=dir0; dir <= dir1; dir++) { for (i=0; i < 16; i+=part_height) { for (j=0; j < 16; j+=part_width) { - int dxy; + int avg=(dir == 1 && dir0 != dir1); + int dxy; x = 16*s->mb_x + j; y = 16*s->mb_y + i; k = ((j>>2)&1) + ((i>>1)&2) + ((j>>1)&4) + (i&8); - pred_motion (h, k, (part_width >> 2), 0, 1, &mx, &my); + pred_motion (h, k, (part_width >> 2), dir, 1, &mx, &my); /* clip motion vector prediction to frame border */ mx = clip (mx, -6*x, 6*(s->h_edge_pos - part_width - x)); @@ -416,7 +479,7 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { fy= ((unsigned)(my + 0x3000))/3 - 0x1000; dxy= (mx - 3*fx) + 4*(my - 3*fy); - svq3_mc_dir_part (s, x, y, part_width, part_height, fx, fy, dxy, 1); + svq3_mc_dir_part (s, x, y, part_width, part_height, fx, fy, dxy, 1, dir, avg); mx += mx; my += my; } else if (mode == HALFPEL_MODE) { @@ -424,7 +487,7 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { my = ((unsigned)(my + 1 + 0x3000))/3 + dy - 0x1000; dxy= (mx&1) + 2*(my&1); - svq3_mc_dir_part (s, x, y, part_width, part_height, mx>>1, my>>1, dxy, 0); + svq3_mc_dir_part (s, x, y, part_width, part_height, mx>>1, my>>1, dxy, 0, dir, avg); mx *= 3; my *= 3; } else { @@ -432,18 +495,37 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { mx = ((unsigned)(mx + 3 + 0x6000))/6 + dx - 0x1000; my = ((unsigned)(my + 3 + 0x6000))/6 + dy - 0x1000; - svq3_mc_dir_part (s, x, y, part_width, part_height, mx, my, 0, 0); + svq3_mc_dir_part (s, x, y, part_width, part_height, mx, my, 0, 0, dir, avg); mx *= 6; my *= 6; } /* update mv_cache */ - fill_rectangle(h->mv_cache[0][scan8[k]], part_width>>2, part_height>>2, 8, pack16to32(mx,my), 4); + fill_rectangle(h->mv_cache[dir][scan8[k]], part_width>>2, part_height>>2, 8, pack16to32(mx,my), 4); } } + } - for (i=0; i < 4; i++) { - memcpy (s->current_picture.motion_val[0][b_xy + i*h->b_stride], h->mv_cache[0][scan8[0] + 8*i], 4*2*sizeof(int16_t)); + /* write back or clear motion vectors */ + if (s->pict_type == P_TYPE || mb_type != 2) { + for (i=0; i < 4; i++) { + memcpy (s->current_picture.motion_val[0][b_xy + i*h->b_stride], h->mv_cache[0][scan8[0] + 8*i], 4*2*sizeof(int16_t)); + } + } else { + for (i=0; i < 4; i++) { + memset (s->current_picture.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t)); + } + } + if (s->pict_type == B_TYPE) { + if (mb_type != 1) { + for (i=0; i < 4; i++) { + memcpy (s->current_picture.motion_val[1][b_xy + i*h->b_stride], h->mv_cache[1][scan8[0] + 8*i], 4*2*sizeof(int16_t)); + } + } else { + for (i=0; i < 4; i++) { + memset (s->current_picture.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t)); + } + } } if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48) @@ -451,40 +533,67 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { cbp = golomb_to_inter_cbp[vlc]; mb_type = MB_TYPE_16x16; - } else if (mb_type == 8) { /* INTRA4x4 */ + } else if (mb_type == 8 || mb_type == 33) { /* INTRA4x4 */ memset (h->intra4x4_pred_mode_cache, -1, 8*5*sizeof(int8_t)); - if (s->mb_x > 0) { - for (i=0; i < 4; i++) { - h->intra4x4_pred_mode_cache[scan8[0] - 1 + i*8] = h->intra4x4_pred_mode[mb_xy - 1][i]; + if (mb_type == 8) { + if (s->mb_x > 0) { + for (i=0; i < 4; i++) { + h->intra4x4_pred_mode_cache[scan8[0] - 1 + i*8] = h->intra4x4_pred_mode[mb_xy - 1][i]; + } + if (h->intra4x4_pred_mode_cache[scan8[0] - 1] == -1) { + h->left_samples_available = 0x5F5F; + } + } + if (s->mb_y > 0) { + h->intra4x4_pred_mode_cache[4+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][4]; + h->intra4x4_pred_mode_cache[5+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][5]; + h->intra4x4_pred_mode_cache[6+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][6]; + h->intra4x4_pred_mode_cache[7+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][3]; + + if (h->intra4x4_pred_mode_cache[4+8*0] == -1) { + h->top_samples_available = 0x33FF; + } } - } - if (s->mb_y > 0) { - h->intra4x4_pred_mode_cache[4+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][4]; - h->intra4x4_pred_mode_cache[5+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][5]; - h->intra4x4_pred_mode_cache[6+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][6]; - h->intra4x4_pred_mode_cache[7+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][3]; - } - /* decode prediction codes for luma blocks */ - for (i=0; i < 16; i+=2) { - vlc = svq3_get_ue_golomb (&s->gb); + /* decode prediction codes for luma blocks */ + for (i=0; i < 16; i+=2) { + vlc = svq3_get_ue_golomb (&s->gb); - if (vlc >= 25) - return -1; + if (vlc >= 25) + return -1; - left = &h->intra4x4_pred_mode_cache[scan8[i] - 1]; - top = &h->intra4x4_pred_mode_cache[scan8[i] - 8]; + left = &h->intra4x4_pred_mode_cache[scan8[i] - 1]; + top = &h->intra4x4_pred_mode_cache[scan8[i] - 8]; - left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]]; - left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]]; + left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]]; + left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]]; - if (left[1] == -1 || left[2] == -1) - return -1; + if (left[1] == -1 || left[2] == -1) + return -1; + } + } else { + /* DC_128_PRED block type */ + for (i=0; i < 4; i++) { + memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_PRED, 4); + } } write_back_intra_pred_mode (h); - check_intra4x4_pred_mode (h); + + if (mb_type == 8) { + check_intra4x4_pred_mode (h); + + h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF; + h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF; + } else { + for (i=0; i < 4; i++) { + memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_128_PRED, 4); + } + + h->top_samples_available = 0x33FF; + h->left_samples_available = 0x5F5F; + } if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48) return -1; @@ -506,6 +615,11 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { for (i=0; i < 4; i++) { memset (s->current_picture.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t)); } + if (s->pict_type == B_TYPE) { + for (i=0; i < 4; i++) { + memset (s->current_picture.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t)); + } + } } if (!IS_INTRA4x4(mb_type)) { memset (h->intra4x4_pred_mode[mb_xy], DC_PRED, 8); @@ -568,12 +682,89 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) { return 0; } +static int svq3_decode_slice_header (H264Context *h) { + MpegEncContext *const s = (MpegEncContext *) h; + const int mb_xy = s->mb_x + s->mb_y*s->mb_stride; + int i, header; + + header = get_bits (&s->gb, 8); + + if (((header & 0x9F) != 1 && (header & 0x9F) != 2) || (header & 0x60) == 0) { + /* TODO: what? */ + fprintf (stderr, "unsupported slice header (%02X)\n", header); + return -1; + } else { + int length = (header >> 5) & 3; + + h->next_slice_index = s->gb.index + 8*show_bits (&s->gb, 8*length) + 8*length; + + if (h->next_slice_index > s->gb.size_in_bits) + return -1; + + s->gb.size_in_bits = h->next_slice_index - 8*(length - 1); + s->gb.index += 8; + + if (length > 0) { + memcpy ((uint8_t *) &s->gb.buffer[s->gb.index >> 3], + &s->gb.buffer[s->gb.size_in_bits >> 3], (length - 1)); + } + } + + if ((i = svq3_get_ue_golomb (&s->gb)) == INVALID_VLC || i >= 3) + return -1; + + h->slice_type = golomb_to_pict_type[i]; + + if ((header & 0x9F) == 2) { + i = (s->mb_num < 64) ? 6 : (1 + av_log2 (s->mb_num - 1)); + s->mb_skip_run = get_bits (&s->gb, i) - (s->mb_x + (s->mb_y * s->mb_width)); + } else { + get_bits1 (&s->gb); + s->mb_skip_run = 0; + } + + h->slice_num = get_bits (&s->gb, 8); + s->qscale = get_bits (&s->gb, 5); + s->adaptive_quant = get_bits1 (&s->gb); + + /* unknown fields */ + get_bits1 (&s->gb); + + if (h->unknown_svq3_flag) { + get_bits1 (&s->gb); + } + + get_bits1 (&s->gb); + get_bits (&s->gb, 2); + + while (get_bits1 (&s->gb)) { + get_bits (&s->gb, 8); + } + + /* reset intra predictors and invalidate motion vector references */ + if (s->mb_x > 0) { + memset (h->intra4x4_pred_mode[mb_xy - 1], -1, 4*sizeof(int8_t)); + memset (h->intra4x4_pred_mode[mb_xy - s->mb_x], -1, 8*sizeof(int8_t)*s->mb_x); + } + if (s->mb_y > 0) { + memset (h->intra4x4_pred_mode[mb_xy - s->mb_stride], -1, 8*sizeof(int8_t)*(s->mb_width - s->mb_x)); + + if (s->mb_x > 0) { + h->intra4x4_pred_mode[mb_xy - s->mb_stride - 1][3] = -1; + } + } + + return 0; +} + static int svq3_decode_frame (AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size) { MpegEncContext *const s = avctx->priv_data; H264Context *const h = avctx->priv_data; - int i; + int m, mb_type; + + *data_size = 0; s->flags = avctx->flags; @@ -584,6 +775,7 @@ static int svq3_decode_frame (AVCodecContext *avctx, h->pred16x16[PLANE_PRED8x8] = pred16x16_plane_svq3_c; h->halfpel_flag = 1; h->thirdpel_flag = 1; + h->unknown_svq3_flag = 0; h->chroma_qp = 4; if (MPV_common_init (s) < 0) @@ -592,67 +784,63 @@ static int svq3_decode_frame (AVCodecContext *avctx, h->b_stride = 4*s->mb_width; alloc_tables (h); - } - - s->low_delay= 1; - - if (avctx->extradata && avctx->extradata_size >= 0x63 - && !memcmp (avctx->extradata, "SVQ3", 4)) { - uint8_t *stsd = (uint8_t *) avctx->extradata + 0x62; + if (avctx->extradata && avctx->extradata_size >= 0x64 + && !memcmp (avctx->extradata, "SVQ3", 4)) { + + GetBitContext gb; - if ((*stsd >> 5) != 7 || avctx->extradata_size >= 0x66) { + init_get_bits (&gb, (uint8_t *) avctx->extradata + 0x62, + 8*(avctx->extradata_size - 0x62)); - if ((*stsd >> 5) == 7) { - stsd += 3; /* skip width, height (12 bits each) */ + /* 'frame size code' and optional 'width, height' */ + if (get_bits (&gb, 3) == 7) { + get_bits (&gb, 12); + get_bits (&gb, 12); } - h->halfpel_flag = (*stsd >> 4) & 1; - h->thirdpel_flag = (*stsd >> 3) & 1; - } - } + h->halfpel_flag = get_bits1 (&gb); + h->thirdpel_flag = get_bits1 (&gb); - if ((buf[0] & 0x9F) != 1) { - /* TODO: what? */ - fprintf (stderr, "unsupported header (%02X)\n", buf[0]); - return -1; - } else { - int length = (buf[0] >> 5) & 3; - int offset = 0; + /* unknown fields */ + get_bits1 (&gb); + get_bits1 (&gb); + get_bits1 (&gb); + get_bits1 (&gb); - for (i=0; i < length; i++) { - offset = (offset << 8) | buf[i + 1]; - } + s->low_delay = get_bits1 (&gb); - if (buf_size < (offset + length + 1) || length == 0) - return -1; + /* unknown field */ + get_bits1 (&gb); - memcpy (&buf[2], &buf[offset + 2], (length - 1)); - } + while (get_bits1 (&gb)) { + get_bits (&gb, 8); + } - init_get_bits (&s->gb, &buf[2], 8*(buf_size - 2)); + h->unknown_svq3_flag = get_bits1 (&gb); + avctx->has_b_frames = !s->low_delay; + } + } - if ((i = svq3_get_ue_golomb (&s->gb)) == INVALID_VLC || i >= 3) - return -1; + /* special case for last picture */ + if (buf_size == 0) { + if (s->next_picture_ptr && !s->low_delay) { + *(AVFrame *) data = *(AVFrame *) &s->next_picture; + *data_size = sizeof(AVFrame); + } + return 0; + } - s->pict_type = golomb_to_pict_type[i]; + init_get_bits (&s->gb, buf, 8*buf_size); - /* unknown fields */ - get_bits (&s->gb, 1); - get_bits (&s->gb, 8); + s->mb_x = s->mb_y = 0; - s->qscale = get_bits (&s->gb, 5); - s->adaptive_quant = get_bits (&s->gb, 1); + if (svq3_decode_slice_header (h)) + return -1; - /* unknown fields */ - get_bits (&s->gb, 1); - get_bits (&s->gb, 1); - get_bits (&s->gb, 2); + s->pict_type = h->slice_type; + s->picture_number = h->slice_num; - while (get_bits (&s->gb, 1)) { - get_bits (&s->gb, 8); - } - if(avctx->debug&FF_DEBUG_PICT_INFO){ printf("%c hpel:%d, tpel:%d aqp:%d qp:%d\n", av_get_pict_type_char(s->pict_type), h->halfpel_flag, h->thirdpel_flag, @@ -660,27 +848,79 @@ static int svq3_decode_frame (AVCodecContext *avctx, ); } - /* B-frames are not supported */ - if (s->pict_type == B_TYPE/* && avctx->hurry_up*/) - return buf_size; + /* for hurry_up==5 */ + s->current_picture.pict_type = s->pict_type; + s->current_picture.key_frame = (s->pict_type == I_TYPE); + + /* skip b frames if we dont have reference frames */ + if (s->last_picture_ptr == NULL && s->pict_type == B_TYPE) return 0; + /* skip b frames if we are in a hurry */ + if (avctx->hurry_up && s->pict_type == B_TYPE) return 0; + /* skip everything if we are in a hurry >= 5 */ + if (avctx->hurry_up >= 5) return 0; + + if (s->next_p_frame_damaged) { + if (s->pict_type == B_TYPE) + return 0; + else + s->next_p_frame_damaged = 0; + } frame_start (h); - for(i=0; i<4; i++){ - int j; - for(j=-1; j<4; j++) - h->ref_cache[0][scan8[0] + 8*i + j]= 1; - h->ref_cache[0][scan8[0] + 8*i + j]= PART_NOT_AVAILABLE; + if (s->pict_type == B_TYPE) { + h->frame_num_offset = (h->slice_num - h->prev_frame_num); + + if (h->frame_num_offset < 0) { + h->frame_num_offset += 256; + } + if (h->frame_num_offset == 0 || h->frame_num_offset >= h->prev_frame_num_offset) { + printf ("error in B-frame picture id\n"); + return -1; + } + } else { + h->prev_frame_num = h->frame_num; + h->frame_num = h->slice_num; + h->prev_frame_num_offset = (h->frame_num - h->prev_frame_num); + + if (h->prev_frame_num_offset < 0) { + h->prev_frame_num_offset += 256; + } + } + + for(m=0; m<2; m++){ + int i; + for(i=0; i<4; i++){ + int j; + for(j=-1; j<4; j++) + h->ref_cache[m][scan8[0] + 8*i + j]= 1; + h->ref_cache[m][scan8[0] + 8*i + j]= PART_NOT_AVAILABLE; + } } for (s->mb_y=0; s->mb_y < s->mb_height; s->mb_y++) { for (s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) { - int mb_type = svq3_get_ue_golomb (&s->gb); + + if ( (s->gb.index + 7) >= s->gb.size_in_bits && + ((s->gb.index & 7) == 0 || show_bits (&s->gb, (-s->gb.index & 7)) == 0)) { + + s->gb.index = h->next_slice_index; + s->gb.size_in_bits = 8*buf_size; + + if (svq3_decode_slice_header (h)) + return -1; + + /* TODO: support s->mb_skip_run */ + } + + mb_type = svq3_get_ue_golomb (&s->gb); if (s->pict_type == I_TYPE) { mb_type += 8; + } else if (s->pict_type == B_TYPE && mb_type >= 4) { + mb_type += 4; } - if (mb_type > 32 || svq3_decode_mb (h, mb_type)) { + if (mb_type > 33 || svq3_decode_mb (h, mb_type)) { fprintf (stderr, "error while decoding MB %d %d\n", s->mb_x, s->mb_y); return -1; } @@ -693,11 +933,21 @@ static int svq3_decode_frame (AVCodecContext *avctx, ff_draw_horiz_band(s, 16*s->mb_y, 16); } - *(AVFrame *) data = *(AVFrame *) &s->current_picture; - *data_size = sizeof(AVFrame); - MPV_frame_end(s); - + + if (s->pict_type == B_TYPE || s->low_delay) { + *(AVFrame *) data = *(AVFrame *) &s->current_picture; + } else { + *(AVFrame *) data = *(AVFrame *) &s->last_picture; + } + + avctx->frame_number = s->picture_number - 1; + + /* dont output the last pic after seeking */ + if (s->last_picture_ptr || s->low_delay) { + *data_size = sizeof(AVFrame); + } + return buf_size; } |